Optical testing instrument.



BEST AVAILABLE CGP" A. F. SHORE. OP'OAL TESTING IHSTBUE-HT.

Mmmmxozr mm ma. ze, um.

Pat-@med EN. 15%, m53.

8 SHEETS-SEMI? l.

A imma? BEST AVAILABLE AEPLICATIOE FILED APB. 16, 1011.

HHN ESSES j whose temperature is the color of the illum1nated, reflector;

2 is a sectional-plan view, take A The constructionis also clearlyfshownfin' v vision of means for manipulating the: l1 ht beam from the said standardsource of ligit,I

`is,illustrated in the accompanying drawtelesco e, pivotedv. concentrically with `the vrit-id by theftube 9; 12 is the shutter mecha- @NEED ALBERT n saone, joi1 kNew Yoran, N. Y.

orTrcaI. TESTING INSTRUMENT.

Terrassa.

Specification et Letters letent.

Patented Nov. 19, i912.

appiicaaon face .apra 1e, isn. serial No. 621,045.

'f-esting instruments, ofrwhich the follow- .f ing is a full, clear, and exact specification.

lily invention relates to optical testing instruments and in one of its specific forms ',onsists -of;1neans for measuring `incandescentV temperatures iwf-comparison with a standard sourceof light. Myinvention has foi-' its ,object the prowhercby, through ,a suitableA coloredshutter or iris diaphragm, the light beamja'cting onarelcctor, permits accurate comparisonsl between the color of the incandescent bodies to be lmeasured and means are also provided for registering said temperature on a scale. These and other objcctsareattained by my invention, which ings, forming a part ofthlsspecification, wherein-`qr ,l l

Figure 1 is arpartial sectional elevation of the preferred form of my invention. Fig.'V

n on a line cent-ral with the telescope-.shown in Fig; 1. Fig. 8 is a perspective viewofthe shutter mechanism case. Figs. Il, 5 and 6 show different forms of colored folor glass used inthe shutter. f- Fig. 7 shows tie shutter mechanism open wide'. Fig. 8 shows the shutter mechanism nearly closed, and Fig. 9 is a cross-section'of the main portion of the instrument, the j section being taken in 4line e-enigep Referring to Fig. 1, 1 is an oil well.; 2 is a knurled ad'usting wheel for the lwick 2'; 3 is a glassdoor to the burner chamber, to permit access to said chamber for lighting the wick, trimming same, andforobservation of the size of theliame; 4 is the usual chimney and air baille arrangement; y5 are plates 33 and 34, transparent balile plates for the-intake of air; 6 is a axis o1 the graduatedscale r(and the flaine 8.

Fig. 2, where 9I is' the condensing 'lens tube,

10 the said lens, and 11 the shutterbox'carf nism'; 13 is a. continuation of the tube 9 and formsfa spindle for the linurled knob 14, rotary scale 7 and cam 15, while inside it is the bearing for the telescope pivotl. Both are hollow synthetic light beams from the flame 8 on to the transparent ground glass screen 1T. 18 is a speculum, of prefer: ly highly polished palladium; 19 is the wide angle objective; 20 a knurled ring, connected with the slidable objective'holder, as by a screw 21 working in a spiral slot 21, Fig. l. r1`he shank of this screw follows the spiral grooves and serves to move forward or backward the objective 19, thus focusing it with thespeculum or reflector 18 and the eye piece 22, Fig. 2. The diaphragm shutter mechanism 12 (Figs."7 and 8) consists of two swinging provided with fringes of y colored foil or glass 35, 35 (Figs. 4, 5 and 6). Said swinging plates 33 and 34 are pivoted at 23 and 2t and connected together by therod 25, so that when the cam-pin 26 is moved in the slot 26 by cam 15, the swinging plates of the shutter mechanism move' in opposite directions. The latel 341 carries a pin 36, against which ears the spring-27 to move the rod 25,

through the instrumentality of the plate f5/1,

normallyintocontact with the connecting pin 26. By providing the adjustable diajphragm 'shutter with the fringes of transparent colored foil or glass 85, the light of the standard flame is made to correspond exactly with the light transmitted by the objects within the temperature range forwhich the instrument is designed. Fig. 7 shows the swinging plates 33 and 34 of the shutter mechanism open and apart, and Fig. 8 shows said plates together and-almost closed. Figs. t and E show other forms of transparent colorecI foil or glass, used for providing the colorer fringes on the swinging plates 38 and 84 oi the shutter mechanism, as shown in Figs. and 8. 28 is an indicator oint attached t( the shutter box 11, for in icating the tem pereture registered on scale 7.

The method of operation is as follows The wick 2 is lighted through the glass tit to permit the focusing of the essi Ait/aimera of whichv is to be measured, focus is obtained in the usual way by turning the knurled ring 20 until the 'object is -distinctly seen. rl`he reflector or speculuni 18` is in the path of vision andappears black while the shutter is closed., As the temperature of the object iii-'the 'furnace rises, it becomes illiiinined and is observed through the eye piece in the telescope. As soon as the 0bject is thus visible, the sliuttermechanism is operated by means of the knurled knob 14, and which shutter mechanism permits the light bcanrto pass to the speeulumlti, illiiinitiating thc saine, after which the shutter mechanism is manipulated until the color orllight ofthe specuhiin 18 is the saine as that of the heated object. ln actual practice, the shutter mechanism is operated so finelythat the light oi' color of the speculiiin 18 is absorbed by the color of thclieated object and' is hardly perceptible through the eye piece 90 rl`lie instrument is so arranged that when the light or color of the speeuhnn 18 is the saine afs that of theheated object, the indicator 28 registers the temperature of the heated' object on the scale 7.

lThis invention may also be used by ro-V tating the scale 7 to the temperature registration to whichv it is desired that the'body which is'tobe measured shall be heated; and? then removing said obiect from the furnace when the' color thereof corresponds with'the color of the speculuin or reflector 18;

it will loe-understood that I do not' limiti myself to the exact construction and ar`j4 rangement shown in the drawings and described and claimed in the specification, as

`it is obvious that variations and modifications in the constructionandarrangement of parts and of the materials used, may be` made and used without departing from the spirit and scope of my invention.

Having thus described my invention,what claim as new and desire to secure by Letters Patent, is:

1. In an optical' testing instrument, the combination with a telescope embodying a speculum in the field of rays oflight from one source and through which telescope light from said source may be viewed, of means for simultaneously directing uponV said speculum rays of light from astandard source of'light for comparison with the rays from said first source, and means, embodying a rotary adjusting element, for varying in a predetermined manner the rays of light directed upon the speculum from said stand'- ardjsource'.

an optical.. testing instrument. they combination with a .telescope 'embodying I"al speculum in thefield'of: rays'of light fromI one source'` and through which telescope light` from said source 'may' bc` viewed, of means' for simultaneously directingnpon saidV speculuni rays ot light from a Istandard source noeste@ of light for comparison with the rays from sind first source, and shutter mechanism,

"ein'bodyii'ig a rotary adjusting element.y for varying in a predetermined manner the rays of light directed upon the speculinn from said standard source.

3. ln an optical testing instrument, the combination with a telescope einboi'rlving a speculuin in the field ot ravs ot light 'from one source and through which telescope light from said source may he viewed, of means for simultaneously directing upon said speciiluiii rays of light from a standard source of light for comparison with the rays from said first source, and shutter mechanism having a colored diaphragm tor varying in a -predeteiinined manner the color and intensity of the rays of light. directed upon the speculuin from said standard source.

4.Injan Optical testing instrument, the combination with a telescope embodying a speculuin in the field of rays of lightfrom one source and through which telescope light from said source may be viewed, ot

Vmeans for .simultaneously directing` upon [said speculuin rays of light from a standard source olight for comparison with the rays fromfsaid first. source, shutter mechanism -liaving a colored diaphragm for varying in a predetermined manner the color and intensity of the rays of light directed from the speculuni fromv said standard source, and a condensing lens between the shutter mechanism andI the standard source of light..

5. n an optical testing instrument., thi combination with a telescope embodying t speculum in the field of rays of light fron' one source and through which telescopi light. from said'source may be viewed, o means for simultaneously directingupoi said speculum rays of light from a standar( source of light for comparison with the ray from said first source, means for var viin in a predetermined manner the rays of ligh directed upon the speculuin from said stand ard source, and means for registering th movements of such light-varying means.

.` 6. In an optical testing instrument, tli combination with a telescope embodying speculum in the field of rays of light. froi one source and through which telescot light from said source may be viewed, t `means for simultaneously directing upc said speculum rays of light from a standai source oilight for comparison with thc raj from said' first source, means for varying a predetermined manner the rays of lig directed upon the speciiliiin from said stan ard source, and a scale and pointer the ino able element. ofwhich is controlled in f movements by the movements of such ligl' varying means.

" 'i'. ln an optical testing instrument, t combination with a telescope embodying speculuni in the field ot rays ot light fr( BEST AVAlLABL CGP" light from said source'may be viewed, :of

means forr simultaneously-'directing u on said speculum rays of light from a stan ard source of light for comparison' with `the rays from said first source, an adjustable shutter mechanism for varyin in a predetermined manner the rays of lglght directed upon the speculum from said standard source, and a scale and pointer the movable element of which is controlled in its movements by the adjustments of the shutter mechanism.

8. in an optical testing instrument, 'the combination with a telescope embodying a. speculuni in the field of rays of light from one source and through which telescope light from said source muy be viewed, of means for simultaneously directing upon said speculum rays of light from a standard source of light for comparison with the rays from Said first source, an adjustable shutter mechanism for varyino in a predetermined manner the rays of light directed uponv the speculum from said standard source said shutter mechanism including a` rotary shutter-operating cam, and a scale and pointer the movable element of which is controlled in its movements by said cam.

9. In an' optical testing instrument, the

combination with a telescope embodying a speculum in the field of rays of light from one sourcer and through which telescope light from said source may be viewed, of

means f for simultaneously directing upon. 'sald'speculum rays of light from a standard source of '1i ht for comparison with the rays from saidY rst source, an adjustable shutter mechanism for var ine' in a predetermined manner the rays of light directed upon the speculum from said standard source, and a ground' glass screen through which lsaid standard light passes to the speculum.

`l0. nan optical testing instrument, the

4combination with a telescope mounted to turn about an axis passing transversely through it and embodying a speculum in the field of rays of light from one source and through which speculum said axis passes, of means for simultaneously directing upon said speculum in any position of said telescope rays of light from a standard source of light for comparison with the rays from said first source.

In testimony whereof, I affix my signature, in presence of two witnesses.

ALBERT F. SHORE. WVitnesses:

HARRY H. THAYER, WILLIAM DRAEMEL, Jr.

@epics oi' this patent' may be obtained for ve cents each, by addressing the Commissioner of EPatents.

' Washington, D. C. 

